Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.8
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3492
Points per Word
0.000286
Page Count
40
Points per Page
0.025
Series
Mission: Science
Description
Earth's crust and the theory of continental drift is explained through coordinating text and photographs.